Osler’s National Disputes team advises on and solves business-critical issues for Canadian, as well as global, organizations.
Best known for handling multijurisdictional class actions and complex corporate/commercial litigation, we defend major institutional clients on high-profile (“bet-the-company”), precedent-setting cases across various industries and at all levels of courts in Ontario, Alberta, Québec, British Columbia and most other provinces, as well as in the Federal Court and the Supreme Court of Canada. We regularly appear in hearings before a variety of provincial and federal tribunals, such as the Financial Services Tribunal, the Ontario Municipal Board, the Environmental Assessment Board and the Ontario and Alberta Securities Commissions and represent clients in various forms of alternative dispute resolution.
While always ensuring our clients are litigation ready, we help our clients develop effective risk management strategies to proactively address potential exposures and mitigate the threat of complex litigation. However, when litigation is unavoidable, we defend our clients in a strategic, coordinated and cost-effective manner. Osler’s Dispute Resolution & Risk Management team has experience in all types of disputes including constitutional and public law, corporate governance, securities, defamation, energy and natural resource, environmental, franchise, consumer protection, intellectual property, privacy, pension and benefits, product liability, professional negligence, tax disputes and white-collar defence. We also leverage the expertise of Osler Works – Disputes, our specialized litigation support group composed of multidisciplinary professionals with dedicated expertise in legal technology, process improvement and management, project management and eDiscovery services.
Areas of Focus
Key Contacts
National Chair
Partner, Disputes, Toronto
Latest Insights
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Blog March 2, 2026
Ontario Construction Act amendments now in effect
Key Takeaways On January 1, 2026, amendments to Ontario's Construction Act came into effect, addressing prompt payment, adjudication, and...
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Osler Update February 5, 2026
New Rules of Civil Procedure on the horizon
Two years after the Ontario government began a review of the province’s Rules of Civil Procedure, sweeping reforms are expected some time in 2026.
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Osler Update February 3, 2026
Federal Court of Appeal affirms new trademark owners not required to account for non-use
The Court has affirmed there is no obligation on new trademark owners to account for non-use prior to the acquisition of the trademark in question.
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Webinar February 3, 2026
Amendments to Ontario’s Construction Act
Osler’s Construction and Infrastructure team discusses project delivery, as well as claims and adjudication strategies.
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Osler News February 19, 2026
Osler welcomes 11 new partners and three new counsel in 2026
Congratulations to our 11 new partners and three new counsel from our offices in Toronto and Montréal.
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Osler News February 13, 2026
Larry Ritchie appointed to FSRA’s Board of Directors
The Government of Ontario has appointed Larry Ritchie, partner, Disputes, and Chair of the Risk Management and Crisis Response practice, as a...
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Media Mentions December 26, 2025
Investors accuse Ontario-based Anaergia of misrepresenting growth prospects in class-action lawsuit – The Globe and Mail
“If it goes the distance, it will be a multiyear process for sure," partner Craig Lockwood tells The Globe and Mail.
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Osler News November 21, 2025
Amelia Miao and Alexandre Fallon named 2025 Lexpert Rising Stars
Congratulations to Amelia Miao and Alexandre Fallon on being chosen as 2025 Lexpert Rising Stars: Canada’s Leading Lawyers Under...
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